Abstract: Effects of different color film mulching on field soil temperature，potato growth and yield were studied to provide scientific basis and technical guidance for potato planting in Yunnan Plateau.In field experiment，three treatments were set up: black film（BM），transparent film（TM），and no film（NM）.Test results showed that，compared with no film mulching，potatoes could increase soil temperature of 0～20 cm soil layer and promote early emergence of potato seedlings，and black film has a more significant warming effect than transparent mulching.Test results of potato plant height and dry matter quality showed that film treatment was greater than no film treatment.Number of potato tubers graded，weight of potato tubers graded，and yield of tubers per plant and plot yield were higher than those without film mulching，and black film mulching had the most significant yield increase effect.Through experiment，it was concluded that film mulching could improve soil temperature，increase emergence rate of potatoes and yield of tubers.